Quality Control

Analyses for Durability and System Design Lifetime: A by Joseph H. Saleh

By Joseph H. Saleh

A subject in engineering layout is a system's layout lifetime. This booklet offers a systemic qualitative and quantitative method of those difficulties addressing, first, the technicality of sturdiness, moment, the marginal expense of sturdiness, and, 3rd, the sturdiness selection challenge for advanced platforms with community externalities (competition and industry uncertainty) and obsolescence (technology evolution). additionally addressed is the expanding rigidity among the layout lifetimes of complicated platforms and the shortening time scales linked to the obsolescence of the know-how. The ebook ends with a dialogue of suppleness in process layout. Dr. Joseph H. Saleh is an Assistant Professor of Aerospace Engineering on the Georgia Institute of know-how. He obtained his Ph.D. from the dep. of Aeronautics and Astronautics at MIT and served because the government Director for the Ford-MIT Alliance. His learn makes a speciality of problems with layout lifetime and the way to embed flexibility within the layout of complicated engineering platforms in most cases and in aerospace procedure particularly. Dr. Saleh is the writer or co-author of fifty technical courses and the recipient of various awards for his instructing and examine contributions. He served as a technical advisor to NASA's Jet Propulsion Laboratory and has collaborated on learn tasks with numerous aerospace businesses.

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Additional info for Analyses for Durability and System Design Lifetime: A Multidisciplinary Approach (Cambridge Aerospace Series)

Example text

Evidently if he makes it too durable, as soon as people have bought one unit they will not need another for a substantial period during which there will be no repeat demand for his product. He has an interest then in making it less durable. . On the other hand, just as he must not set his price too high, so he must not offer a product [that] wears out too fast in comparison with others on the market. The problem is to find the length of life of his product which will maximize his profits. (Chamberlin, 1953, pp.

7 The reader will notice that some of the stakeholders’ advantages in reducing system design lifetimes transform into disadvantages when longer design lifetimes are considered, and vice versa. 3 To Reduce or to Extend a Product’s Durability? From a manufacturer’s perspective, there are three main implications associated with an increased system design lifetime. First, systems with longer design lifetimes offer an increased ability to generate additional revenue and profit from service contracts rather than from the sale of the system (it is worth noting that, for satellites, manufacturers normally do not have service contracts, but usually provide anomaly support through the contracted life on-orbit at no cost to the operator).

The Swedish economist Knut Wicksell (1851–1926) is traditionally associated with the origins of economic thought on durability. ” He proposes to treat the “lifetime of capital-goods as if it were altogether separated from their other property” and suggests that “machines [ . . ” The (flawed) idea that consumers are always better served by longer durability may date back to Wicksell when he states, for example, “a farmer has to choose between two ploughs, one which lasts ten years, and the other lasting eleven.

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